Ok, just solved it through trial and error.

Had a messy QEventLoop and another place, which, however, was used during auth parsing.
Now it looks like this:

QNetworkAccessManager nam; QEventLoop loop; connect(&nam, &QNetworkAccessManager::finished, this, &RestConn::processReply); nam.get(*request); loop.connect(&nam, SIGNAL(finished(QNetworkReply*)),&loop, SLOT(quit())); loop.exec(QEventLoop::AllEvents);

And before - in the error case - the last two lines did not follow in correct order as they were:

// This order is not correct loop.exec(QEventLoop::AllEvents); loop.connect(&nam, SIGNAL(finished(QNetworkReply*)),&loop, SLOT(quit()));

Thanks to all anyway.

@SGaist No warning from the setup interface, now use the MinGW are all normal

Hi koahnig its all working now but i get this warning:

<dump of C:\QT\Qt5.5.0\5.5\mingw492_32\qml>:1:24: Reading only version 1.1 parts.

<dump of C:\QT\Qt5.5.0\5.5\mingw492_32\qml>:10:5: Expected only Component and ModuleApi object definitions.

@SGaist thanks , I have actually compiled without the script no errors thought while compiling, but I'm not sure if the errors will popup when i start using the build, but it would be really useful for future builds also I'm compiling OpenCV , so here is my installation paths :

DirectX SDK : C:\Program Files\Microsoft DirectX SDK (June 2010)
Microsoft SDK : C:\Program Files\Microsoft SDKs
MSVC : C:\Program Files\Microsoft Visual Studio 12.0
.NET : C:\Program Files\Microsoft.NET
OpenSSL : C:\OpenSSL-Win32
Qt source : C:\Qt\5.4.1

thanks again for your time

@BlackMamba

Looks like :
CONFIG += resources_big
in the .pro file is working :)

I need to test on linux to see if this option is crosscompiler :)